Re: librbd 4k read/write?

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> > Good afternoon everybody!
> >
> > I have the following scenario:
> > Pool RBD replication x3
> > 5 hosts with 12 SAS spinning disks each
> >
> > I'm using exactly the following line with FIO to test:
> > fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4M -size=10G
> > -iodepth=16 -rw=write -filename=./test.img
> >
> > If I increase the blocksize I can easily reach 1.5 GBps or more.
> >
> > But when I use blocksize in 4K I get a measly 12 Megabytes per second,
> >
> This is 3000iops. I would call that bad for 60 drives and a replication of
> 3. Which amount of iops did you expect?
> 

How is this related to 60 drives? His test is only on 3 drives at a time not? 
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